22015841380 has 96 divisors (see below), whose sum is σ = 51399333216. Its totient is φ = 7868399616.

The previous prime is 22015841371. The next prime is 22015841429. The reversal of 22015841380 is 8314851022.

It is a happy number.

It can be written as a sum of positive squares in 16 ways, for example, as 779191396 + 21236649984 = 27914^2 + 145728^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1889332 + ... + 1900948.

It is an arithmetic number, because the mean of its divisors is an integer number (535409721).

Almost surely, 2^22015841380 is an apocalyptic number.

22015841380 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 22015841380, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25699666608).

22015841380 is an abundant number, since it is smaller than the sum of its proper divisors (29383491836).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

22015841380 is a wasteful number, since it uses less digits than its factorization.

22015841380 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11873 (or 11871 counting only the distinct ones).

The product of its (nonzero) digits is 15360, while the sum is 34.

The spelling of 22015841380 in words is "twenty-two billion, fifteen million, eight hundred forty-one thousand, three hundred eighty".